Screen.



SCREEN'. APPLICATION AFILEYD MAR. 26.` l9l8'.'.

Patented Dec.. 3, 191

Witnesses/Q UNITE 'asl- STATES JOHN oBizIEN, oFfsfrAYNER, ONTARIO, CANADA.

To'all wlw/n, t may concern Be it known that I. J oHN OBRIEN, a. subf u ject-'of the King of Grreat Britain, and residentofthe town of Stayner, county' of Sim- '.jicoe, Province of Ontario, in Vthe v-Doininion 'cfg-Canada, have invented certain'new and '..uSeful.-Irnprove1iients in Screens, of which .5fthe' following is a specification.

i. (The invention relates to improvements in -tioir and' illustrated. in the accompanying screens as described in the present specificadrawings` that form a part ofthe same. 'f

The invention consists essentially of the i novel'construction and arrangement of parts whereb a screen ispiovided with openings adapte to permit the passage of insects in .one direction only.

lThe objects of the invention areto pro? vide a screen through which' insects may the screen Ashown in Fig. 1.' y

Like nunieralsof reference indicatel correlsponding parts in each figure.- I

Referring to the` drawings, the'frame in. vwhichfthe netting is supported-is composed-- "-of vertical end members 1 preferably of' a" .width to correspond to the thickness of the window vor. door which it replaces, a. bottom member 2 connecting said end membersand. having upwardly' turned flanges 3 "andv 4:, and a top member- 5 having'its'outer-pon' tion 6 turnedv'downwardly yaconsiderablet .distance 'and having Vits lower end bent to .form jaws "l to receive 'aii- .end of vthe f wireV n'e'tting. M'

pass outwardly and `cannot retnm'tofacilitate the proper ventilation of rooms and generally to provide.. a' screen which .will `be line'irp'elusive to manufacture, durable and eficieia ln the drawings Figure 11saview ofthe outer side of'fthe screen'showing the insect Fig. 2 showsa modified 'fornrof 'S'cr'e'enwith means for adjusting thelength of saine.- 'l

Fig. 3' is a cross .sectional 'view 'through substantially the center of Fig. 2.

` view through.

Figa is a cross sectional The -wire netting turned forwardiv and downwardlyatl-'lan acute angle and secured fin the gaw's 7;

" The' netting at thepcint cf' bending isl Specification of Letters Patent. Patented Dec.. 3, QLS. Application filed March-2'6, 1918.I Serial No. 224,711. I

provided with a plurality7 of openings 9 through which the insects may pass outwardly but through which they cannot return owing to the acuteness ofthe angle at the point Where said openings are located. To Vprovide a means of adjusting the length of the Screen to-properly fit the window or door an extension'nieniber 10 cone sisting of a box like franie having ianges 1l slidabl)vv arranged over the top and bottom of the screen frame' is provided, said frame having in the interior thereof tensioned springs l2 ladapted to hold the device in close engagement withl the sides of the window or door.

. In Figs. 2 and -3 a modified form of adjustable 'screen is shown in which-the frame is madein two sections 13 and 14, the section 13 being slidably. arranged within the sec-v 4tiOnlq I 1 Owin to the friction caused by continuous slicing of one fraine within-the other it is preferable to'cover the net at the point of bendin 'with metal strips 15 and 16 through iv lich the openings 9 extend, the strip 16 .having its edge suitably bent 'to form a 'slot in which. the -stripl slides.

is raised and the screen .placed in the opening, the window being then .drawn down to 'closely engagel the top thereof, and 4as the insects light on the inner side of the netting they will crawl upwardly thereon and pass out through the openings 9V through which they cannqt return.

What I claim isilIn a screen-a pair of` frames telescopically arranged Vone within the other,a wire mesh section secured vto e'ach o f said frames and .adjacent to. the tops of said frames being turned forwardly at an acute angle and se'- cured to the front wall ofthe corresponding frame, metal guides secured `to the front walls of 'said frames and extending over the bent portions of said wirejinesh sections and bei-ng slidably arrangedone within the other and insect openings through said guides 'and through said wire mesh sections at the points -of bending.

' Signed at the town of'Stayner, Ont., this 421st day of August, 1917. l

N JOHN OBRIEN.

` iBnssiE Willem In the use of the. invention the window 

